| Message ID | ce88d442ba6398853ac63351107e0028ef659660.1718606975.git.perry.yuan@amd.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | AMD Pstate Driver Fixes and Improvements | expand |
On 6/17/2024 01:59, Perry Yuan wrote: > To address issues with the loading of the amd-pstate driver on certain platforms, > It needs to enable dynamic debugging to capture debug messages during the driver > loading process. By adding "amd_pstate.dyndbg=+p cppc_acpi.dyndbg=+p debug > amd_pstate=active" and loglevel to the kernel command line, then driver debug > logging is enabled. > > Signed-off-by: Perry Yuan <perry.yuan@amd.com> > --- > Documentation/admin-guide/pm/amd-pstate.rst | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst > index 1e0d101b020a..ceeb073c9ada 100644 > --- a/Documentation/admin-guide/pm/amd-pstate.rst > +++ b/Documentation/admin-guide/pm/amd-pstate.rst > @@ -472,6 +472,20 @@ operations for the new ``amd-pstate`` module with this tool. :: > Diagnostics and Tuning > ======================= > > +Debugging AMD P-State Driver Loading Issues > +------------------------------------------ > + > +If the amd-pstate driver fails to load, additional debug information > +may be necessary. > +To capture debug messages for issue analysis, users can add below parameter, > +"amd_pstate.dyndbg=+p cppc_acpi.dyndbg=+p debug" What keys off "debug"? I would expect that dynamic debugging for the first two is sufficient. That being said; isn't everything important shown as a warning now with this series? Is this patch still needed? > +to the kernel command line. This will enable dynamic debugging and allow better > +analysis and troubleshooting of the driver loading process. > + > +Please note that adding this parameter will only enable debug logging during the > +driver loading phase and may affect system behavior. Use this option with caution > +and only for debugging purposes. > + > Trace Events > -------------- >
diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 1e0d101b020a..ceeb073c9ada 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -472,6 +472,20 @@ operations for the new ``amd-pstate`` module with this tool. :: Diagnostics and Tuning ======================= +Debugging AMD P-State Driver Loading Issues +------------------------------------------ + +If the amd-pstate driver fails to load, additional debug information +may be necessary. +To capture debug messages for issue analysis, users can add below parameter, +"amd_pstate.dyndbg=+p cppc_acpi.dyndbg=+p debug" +to the kernel command line. This will enable dynamic debugging and allow better +analysis and troubleshooting of the driver loading process. + +Please note that adding this parameter will only enable debug logging during the +driver loading phase and may affect system behavior. Use this option with caution +and only for debugging purposes. + Trace Events --------------
To address issues with the loading of the amd-pstate driver on certain platforms, It needs to enable dynamic debugging to capture debug messages during the driver loading process. By adding "amd_pstate.dyndbg=+p cppc_acpi.dyndbg=+p debug amd_pstate=active" and loglevel to the kernel command line, then driver debug logging is enabled. Signed-off-by: Perry Yuan <perry.yuan@amd.com> --- Documentation/admin-guide/pm/amd-pstate.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+)